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Discontinued

M27C256B-12F1

256Kb (32K x 8) UV erasable EPROM, 120ns, ceramic DIP-28 with window

The read
The M27C256B-12F1 is a 256Kb UV erasable EPROM, one of the most common firmware carriers of its era. Maintainers of legacy industrial, transit, and instrumentation systems still burn replacement code onto it. Authorized stock is zero.
ManufacturerSTMicroelectronics
Lifecycle statusDiscontinued
CategoryMemory
How Sourcible handles this part
Remaining lots trade on the open market. Anything we source outside authorized distribution goes through an independent AS6081-accredited laboratory before it ships. You get tested parts and the report to prove it.

M27C256B-12F1 frequently asked questions

Is M27C256B-12F1 still available?

M27C256B-12F1 is no longer in production. STMicroelectronics discontinued it. Remaining lots may still exist outside authorized distribution, and Sourcible LLC locates and verifies that material on request.

Is M27C256B-12F1 discontinued or end of life?

Yes. M27C256B-12F1 is discontinued at STMicroelectronics.

What are the alternatives to M27C256B-12F1?

Alternatives to M27C256B-12F1 depend on the application. Sourcible LLC identifies verified substitutes on request rather than publishing a generic cross reference.

Where can I buy M27C256B-12F1 now that it is obsolete?

M27C256B-12F1 no longer ships from STMicroelectronics production. Sourcible LLC sources remaining inventory of M27C256B-12F1 for OEM and EMS buyers. Components sourced outside authorized distribution are inspected by an independent AS6081-accredited lab before shipment. Submit a requirement on this page to start.

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